Steps to reproduce (inconsistent - has happened 4 or 5 times to me)
1. Click the button to upload recording
2. Error appears sometimes upon opening the upload form
3. Ignore the error, and try to upload a recording. When you click in the "Media file" field, the error will reappear.
4. ignore the error again, and you will be able to open the file picker and choose a file. However, you will not be able to submit the form. The fields checker will indicate that you did not provide a media file, even though you did.
Windows debugger shows:
Object doesn't support this property or method oc.utils.js, line 231 character 5
window.console && console.log.apply(console,Array.prototype.slice.call(arguments));
(the problem is the first } in the 2nd line above)
Workaround (if any):
Since this error is inconsistent, refreshing the page often resolves the error